Internet Access for users logged into Win2K3 Server

I have a Win2K3 server running which is connected to the internet. The Server then connects to a switch so that other computers may log into the Win2K3 box.

For some reason the Win2k3 box can access the internet but the users logged in cannot. I have a basic setup and when I created the user accounts I made sure that their profile allowed internet access. I added each computer’s DNS record on the Win2K3 server.

I don’t know why the users just can’t get to the internet….I’m started to pull my hair…any help??